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dc.contributor.authorKarl, Markus
dc.contributor.authorWhitworth, Guy Luke
dc.contributor.authorSchubert, Marcel
dc.contributor.authorDietrich, Christof Peter
dc.contributor.authorSamuel, Ifor David William
dc.contributor.authorTurnbull, Graham A.
dc.contributor.authorGather, Malte Christian
dc.identifier.citationKarl , M , Whitworth , G L , Schubert , M , Dietrich , C P , Samuel , I D W , Turnbull , G A & Gather , M C 2016 , ' Optofluidic distributed feedback lasers with evanescent pumping : reduced threshold and angular dispersion analysis ' , Applied Physics Letters , vol. 108 , no. 26 , 261101 .
dc.identifier.otherORCID: /0000-0002-2132-7091/work/31037446
dc.identifier.otherORCID: /0000-0002-4857-5562/work/47136490
dc.identifier.otherORCID: /0000-0002-8739-4852/work/36937596
dc.descriptionThe authors acknowledge financial support from the European Research Council (ERC StG ABLASE, 640012), the Scottish Funding Council (via SUPA) and the European Union Marie Curie Career Integration Grant (PCIG12-GA-2012-334407). M.K. and G.L.W. acknowledge funding from the EPSRC DTG (EP/M506631/1 and EP/K503162/1). M.S. acknowledges funding from the European Commission for a Marie Sklodowska-Curie Individual Fellowship (659213). I.D.W.S. acknowledges funding from a Royal Society Wolfson research merit award. The research data supporting this publication can be accessed at
dc.description.abstractWe demonstrate an evanescently pumped water-based optofluidic DFB laser with a record low pump threshold of ETH = 520 nJ. The low threshold results from an optimized mode shape, which is achieved by a low refractive index substrate, and from the use of a mixed-order DFB grating. Investigating the photonic band structure via angular dispersion analysis both above and below lasing threshold allows us to measure the refractive index of the liquid gain layer and to determine device parameters such as the waveguide core layer thickness. We show that it is possible to tailor the divergence of the lasing emission by varying the number of second order grating periods used for outcoupling.
dc.relation.ispartofApplied Physics Lettersen
dc.subjectDistributed feedback (DFB) laseren
dc.subjectOptofluidic Lasersen
dc.subjectEvanescent laseren
dc.subjectAngular dispersionen
dc.subjectQC Physicsen
dc.titleOptofluidic distributed feedback lasers with evanescent pumping : reduced threshold and angular dispersion analysisen
dc.typeJournal articleen
dc.contributor.sponsorEuropean Research Councilen
dc.contributor.sponsorEuropean Commissionen
dc.contributor.sponsorEuropean Commissionen
dc.contributor.sponsorThe Royal Societyen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.contributor.institutionUniversity of St Andrews. Biomedical Sciences Research Complexen
dc.description.statusPeer revieweden

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